Selective flotation of chalcopyrite and molybdenite by surface oxidation

Tsuyoshi Hirajima, Masanori Mori, Osamu Ichikawa, Keiko Sasaki, Hajime Miki, Mitsuru Sawada

Research output: Contribution to conferencePaper

Abstract

For pretreatment of selective flotation, surface oxidation of chalcopyrite and molybdenite was applied by oxygen plasma then the minerals were washed by solution at pH 9 with oxygen bubbling. Surface characteristics of these minerals were investigated with AFM, XPS, zeta potential and contact angle measurements. Contact angle of chalcopyrite and molybdenite decreased a lot by plasma treatment. When they were washed with pH 9 solution with oxygen bubbling, contact angle of molybdenite increased whereas chalcopyrite one kept low. Adhesion force measurements indicated similar behavior. Result of flotation experiments indicated low recovery of both chalcopyrite and molybdenite after plasma treatment and only molybdenite recovery became higher after washing. Selective flotation of chalcopyrite and molybdenite could be achieved with this process. Possible mechanism of selective flotation was proposed from the results of XPS, AFM, etc.

Original languageEnglish
Publication statusPublished - Jan 1 2014
Event27th International Mineral Processing Congress, IMPC 2014 - Santiago, Chile
Duration: Oct 20 2014Oct 24 2014

Other

Other27th International Mineral Processing Congress, IMPC 2014
CountryChile
CitySantiago
Period10/20/1410/24/14

All Science Journal Classification (ASJC) codes

  • Earth-Surface Processes
  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering

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    Hirajima, T., Mori, M., Ichikawa, O., Sasaki, K., Miki, H., & Sawada, M. (2014). Selective flotation of chalcopyrite and molybdenite by surface oxidation. Paper presented at 27th International Mineral Processing Congress, IMPC 2014, Santiago, Chile.